DAQ-2024-010146

Utah Division of Air Quality
Attachment C: Hazardous Air Pollutant List

Below is a list of the 187 hazardous air pollutants (HAPs) that are regulated by the Clean Air
Act Amendments (CAA) of 1990. Please indicate which pollutants are emitted by your
business by checking the appropriate box(es) below. Provide an estimate of the expected
annual and potential to emit emissions of HAPs and record in Section IV, Air Emission
Information, of the Small Source Registration Notice.

† 75-07-0 Acetaldehyde
† 60-35-5 Acetamide
† 75-05-8 Acetonitrile
† 98-86-2 Acetophenone
† 53-96-3 2-Acetylaminofluorene
† 107-02-8 Acrolein
† 79-06-1 Acrylamide
† 79-10-7 Acrylic acid
† 107-13-1 Acrylonitrile
† 107-05-1 Allyl chloride
† 92-67-1 4-Aminobiphenyl
† 62-53-3 Aniline
† 90-04-0 o-Anisidine
† Varies Antimony Compounds
† Varies Arsenic Compounds (inorganic including
arsine)
† 1332-21-4 Asbestos

† 71-43-2 Benzene (including benzene from
gasoline)
† 92-87-5 Benzidine
† 98-07-7 Benzotrichloride
† 100-44-7 Benzyl chloride
† Varies Beryllium Compounds
† 92-52-4 Biphenyl
† 542-88-1 Bis(chloromethyl)ether
† 117-81-7 Bis(2-ethylhexyl)phthalate (DEHP)
† 75-25-2 Bromoform
† 106-99-0 1,3-Butadiene

† Varies Cadmium Compounds
† 156-62-7 Calcium cyanamide
† 133-06-2 Captan
† 63-25-2 Carbaryl
† 75-15-0 Carbon disulfide
† 56-23-5 Carbon tetrachloride
† 463-58-1 Carbonyl sulfide
† 120-80-9 Catechol
† 57-74-9 Chlordane
† 133-90-4 Chloramben
† 7782-50-5 Chlorine
† 79-11-8 Chloroacetic acid
† 532-27-4 2-Chloroacetophenone
† 108-90-7 Chlorobenzene
† 510-15-6 Chlorobenzilate
† 67-66-3 Chloroform
† 126-99-8 Chloroprene
† 107-30-2 Chloromethyl methyl ether
† Varies Chromium Compounds
† Varies Cobalt Compounds
† Varies Coke Oven Emissions
† 108-39-4 m-Cresol
† 95-48-7 o-Cresol
† 106-44-5 p-Cresol
† 1319-77-3 Cresols/Cresylic acid (isomers and mixture)
† 98-82-8 Cumene
Varies Cyanide Compounds

† 94-75-7 2,4-D (2,4Dichlorophenoxyacetic acid,
including salts and esters)
† 72-55-9 DDE (1, 1-Dichloro-2, 2-Bis(p-
Chlorophenyl) Ethylene)
† 334-88-3 Diazomethane
† 132-64-9 Dibenzofurans
† 96-12-8 1,2-Dibromo-3-chloropropane
† 84-74-2 Dibutylphthalate
† 106-46-7 1,4-Dichlorobenzene(p)
† 91-94-1 3,3-Dichlorobenzidene
† 111-44-4 Dichloroethyl ether (Bis(2-chloroethyl)ether)
† 542-75-6 1,3-Dichloropropene
† 62-73-7 Dichlorvos
† 111-42-2 Diethanolamine
† 121-69-7 N,N-Diethyl aniline (N,N-Dimethylaniline)
† 64-67-5 Diethyl sulfate
† 534-52-1 4,6-Dinitro-o-cresol, and salts
† 51-28-5 2,4-Dinitrophenol
† 121-14-2 2,4-Dinitrotoluene
† 60-11-7 Dimethyl aminoazobenzene
† 79-44-7 Dimethyl carbamoyl chloride
† 68-12-2 Dimethyl formamide
† 57-14-7 1,1-Dimethyl hydrazine
† 131-11-3 Dimethyl phthalate
† 77-78-1 Dimethyl sulfate
† 119-90-4 3,3-Dimethoxybenzidine
† 119-93-7 3,3',-Dimethyl benzidine
† 123-91-1 1,4-Dioxane (1,4-Diethyleneoxide)
† 122-66-7 1,2-Diphenylhydrazine

† 106-89-8 Epichlorohydrin
(l-Chloro-2,3-epoxypropane)
† 106-88-7 1,2-Epoxybutane
† 140-88-5 Ethyl acrylate
† 100-41-4 Ethyl benzene
† 51-79-6 Ethyl carbamate (Urethane)
† 75-00-3 Ethyl chloride (Chloroethane)
† 106-93-4 Ethylene dibromide (Dibromoethane)
† 107-06-2 Ethylene dichloride (1,2-Dichloroethane)
† 107-21-1 Ethylene glycol
† 151-56-4 Ethylene imine (Aziridine)
† 75-21-8 Ethylene oxide
† 96-45-7 Ethylene thiourea
† 75-34-3 Ethylidene dichloride (1,1-Dichloroethane)
† Varies Fine mineral fibers
† 50-00-0 Formaldehyde

† Varies Glycol ethers

† 76-44-8 Heptachlor
† 118-74-1 Hexachlorobenzene
† 87-68-3 Hexachlorobutadiene
† 77-47-4 Hexachlorocyclopentadiene
† 67-72-1 Hexachloroethane
† 822-06-0 Hexamethylene-1,6-diisocyanate
† 680-31-9 Hexamethylphosphoramide
† 110-54-3 Hexane
† 302-01-2 Hydrazine
† 7647-01-0 Hydrochloric acid (Hydrogen chloride)
† 7664-39-3 Hydrogen fluoride (Hydrofluoric acid)
† 123-31-9 Hydroquinone

† 78-59-1 Isophorone

† Varies Lead Compounds
† 58-89-9 Lindane (all isomers)

† 108-31-6 Maleic anhydride
† Varies Manganese Compounds
† Varies Mercury Compounds
† 67-56-1 Methanol
† 72-43-5 Methoxychlor
† 74-83-9 Methyl bromide (Bromomethane)
† 74-87-3 Methyl chloride (Chloromethane)
† 71-55-6 Methyl chloroform (1,1,1-Trichloroethane)
† 60-34-4 Methyl hydrazine
† 74-88-4 Methyl iodide (Iodomethane)
† 108-10-1 Methyl isobutyl ketone (Hexone)
† 624-83-9 Methyl isocyanate
† 80-62-6 Methyl methacrylate
† 1634-04-4 Methyl tert butyl ether
† 101-14-4 4,4-Methylene bis(2-chloroaniline)
† 75-09-2 Methylene chloride (Dichloromethane)
† 101-68-8 Methylene diphenyl diisocyanate (MDI)
† 101-77-9 4,4,-Methylenedianiline

† 91-20-3 Naphthalene
† Varies Nickel Compounds
† 98-95-3 Nitrobenzene
† 100-02-7 4-Nitrophenol
† 79-46-9 2-Nitropropane
† 684-93-5 N-Nitroso-N-methylurea
† 59-89-2 N-Nitrosomorpholine
† 62-75-9 N-Nitrosodimethylamine
† 92-93-3 4-Nitrobiphenyl

† 56-38-2 Parathion
† 82-68-8 Pentachloronitrobenzene (Quintobenzene)
† 87-86-5 Pentachlorophenol
† 108-95-2 Phenol
† 106-50-3 p-Phenylenediamine
† 75-44-5 Phosgene
† 7803-51-2 Phosphine
† 7723-14-0 Phosphorus
† 85-44-9 Phthalic anhydride
† 1336-36-3 Polychlorinated biphenyls (Aroclors)
† Varies Polycylic Organic Matter
† 1120-71-4 1,3-Propane sultone
† 57-57-8 beta-Propiolactone
† 123-38-6 Propionaldehyde
† 114-26-1 Propoxur (Baygon)
† 75-55-8 1,2-Propylenimine (2-Methyl aziridine)
† 78-87-5 Propylene dichloride (1,2-Dichloropropane)
† 75-56-9 Propylene oxide

† 91-22-5 Quinoline
† 106-51-4 Quinone

† Varies Radionuclides (including radon)

† Varies Selenium Compounds
† 96-09-3 Styrene oxide
† 100-42-5 Styrene

† 1746-01-6 2,3,7,8-Tetrachlorodibenzo-p-dioxin
† 79-34-5 1,1,2,2-Tetrachloroethane
† 127-18-4 Tetrachloroethylene (Perchloroethylene)
† 7550-45-0 Titanium tetrachloride
† 108-88-3 Toluene
† 95-80-7 2,4-Toluene diamine
† 584-84-9 2,4-Toluene diisocyanate
† 95-53-4 o-Toluidine
† 8001-35-2 Toxaphene (chlorinated camphene)
† 120-82-1 1,2,4-Trichlorobenzene
† 79-00-5 1,1,2-Trichloroethane
† 79-01-6 Trichloroethylene
† 95-95-4 2,4,5-Trichlorophenol
† 88-06-2 2,4,6-Trichlorophenol
† 121-44-8 Triethylamine
† 1582-09-8 Trifluralin
† 540-84-1 2,2,4-Trimethylpentane

† 108-05-4 Vinyl acetate
† 593-60-2 Vinyl bromide
† 75-01-4 Vinyl chloride
† 75-35-4 Vinylidene chloride (1,1-Dichloroethylene)

† 1330-20-7 Xylenes (isomers and mixture)
† 108-38-3 m-Xylenes
† 95-47-6 o-Xylenes
† 106-42-3 p-Xylenes

NOTE: For all listings above which
contain the word "compounds" and for
glycol ethers, the following applies:
Unless otherwise specified, these listings
are defined as including any unique
chemical substance that contains the
named chemical (i.e., antimony,
arsenic, etc.) as part of that chemical's
infrastructure. Polymers are excluded
from the glycol category.

August 2007